Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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These are data communication fault codes indicating other computers are not able to communicate with the power train module (PCM or engine and transmission computer as it is known).When there is a loss of communication like this here this can cause running and shifting issues.Usually this fault is caused by damaged wiring or wiring connections to or at the PCM or the PCM itself may be at fault needing replaced.Your PCM is located at the top passenger side of the engine area as seen in the link below.
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